CN218857576U

CN218857576U - Flash-free fine round hole forming injection mold

Info

Publication number: CN218857576U
Application number: CN202320043614.2U
Authority: CN
Inventors: 黄巡
Original assignee: Dongguan Xinjiu Precision Mold Co ltd
Current assignee: Dongguan Xinjiu Precision Mold Co ltd
Priority date: 2023-01-09
Filing date: 2023-01-09
Publication date: 2023-04-14
Anticipated expiration: 2033-01-09

Abstract

The utility model relates to the technical field of injection molds, in particular to a flash-free thin round hole forming injection mold, which comprises an upper mold and a lower mold, wherein two sealing rings are arranged and are respectively positioned at the lower end of the upper mold and the upper end of the lower mold, the sealing rings are used for enhancing the connection tightness between the upper mold and the lower mold, and the upper mold is provided with exhaust holes; the trimming components are symmetrically arranged at the upper side of the lower die and comprise cutters for cutting off the flash, the cutters can extend to the middle part of the lower die when in use and can move up and down in the vertical direction to cut off the flash of the model, the utility model discloses a seal ring is arranged to reduce the gap between the upper die and the lower die as much as possible, thereby avoiding the injection liquid from seeping out from the gap to generate the flash; utilize the motor to drive the top that the cutter can reach the edge in groove of moulding plastics down, then make the cutter move down through pressing the briquetting and excise the overlap, saved the later stage and taken out the step that the model carried out polishing.

Description

Flash-free fine round hole forming injection mold

Technical Field

The utility model relates to an injection mold technical field specifically is a no overlap thin round hole shaping injection mold.

Background

The injection mold is poured with liquid which is melted by heating during injection molding, the liquid is molded after cooling, thin solidified bodies which extend outwards slightly at the corner positions of a blank are flash, the flash is also called as flash, burr and the like, the flash mostly occurs at the split-joint positions of the mold, the flash generated by the existing mold processing products is mostly caused by the leaked injection liquid because the butt-joint position of the mold is not particularly tight, the flash generated by the existing mold processing products is usually removed by manual polishing after the mold is taken out, the workload is large, the production efficiency is low, meanwhile, the product is easy to scrap due to manual flash removal, and the production cost is high. In view of this, we propose a flash-free fine round hole injection mold.

SUMMERY OF THE UTILITY MODEL

In order to make up for above not enough, the utility model provides a no overlap thin round hole shaping injection mold.

The technical scheme of the utility model is that:

the utility model provides a no overlap thin round hole shaping injection mold, includes mould and bed die, still includes: the two sealing rings are respectively positioned at the lower end of the upper die and the upper end of the lower die and used for enhancing the connection tightness between the upper die and the lower die, and the upper die is provided with an exhaust hole; the trimming assembly is symmetrically arranged on the upper side of the lower die and comprises a cutter for cutting off the flash, the cutter can extend to the middle of the lower die when in use, and the cutter can move up and down in the vertical direction to cut off the flash of the model.

Preferably, the bottom end of the upper mold is provided with an upper injection molding groove, the top end of the upper mold is provided with an injection molding hole communicated with the upper injection molding groove, the injection molding hole is provided with a sealing cover, the exhaust hole is communicated with the upper injection molding groove, the upper end of the exhaust hole is provided with an exhaust pipe, the edge of the bottom side of the upper injection molding groove is provided with an annular first mounting groove, one sealing ring is located in the first mounting groove, and the bottom end of the upper mold is provided with a plurality of positioning holes.

Preferably, a plurality of positioning rods are arranged on the lower die, a lower injection molding groove is arranged at the upper end of the lower die, a second mounting groove is formed in the edge of the upper side of the lower injection molding groove, the other sealing ring is located in the second mounting groove, and pressing grooves are symmetrically formed in the side end of the lower die.

Preferably, the trimming component comprises a guide plate, pressing blocks are symmetrically arranged on two sides of the guide plate, a first fixing plate is arranged on one side of the upper end of the guide plate, a second fixing plate is arranged in the middle of the upper end of the guide plate, a fixing rod is arranged between the first fixing plate and the second fixing plate, a cutter holder is arranged at one end of the fixing rod, and the cutter is located at the tail end of the cutter holder.

Preferably, a guide groove is formed in the upper end of the guide plate, a screw rod is arranged in the guide groove, a thread block is arranged in the guide groove, the thread block is connected to the lower end of the first fixing plate, and a power source for driving the screw rod to rotate is further arranged in the guide groove.

Preferably, one side of the guide plate extends into the pressing groove respectively, a plurality of guide rods are arranged in the pressing groove, and elastic pieces are arranged on the guide rods.

Preferably, the elastic member is a spring.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model enhances the connection between the upper die and the lower die by arranging the sealing ring, and simultaneously, the air between the upper die and the lower die is pumped out from the exhaust pipe, so that the gap between the upper die and the lower die is reduced as much as possible, and the injection liquid is prevented from seeping out from the gap to generate flash; the cutter in groove of moulding plastics and making a bet groove has been set up in the laminating in the bed die both sides, and when model edge produced a small amount of overlap, usable motor drove the cutter and just in time reachs the top of the edge in groove of moulding plastics down, then makes the cutter move down through pressing the briquetting and amputate the overlap, and easy operation can further avoid the model to produce the overlap, has saved the later stage and has taken out the step that the model polished, improves production efficiency.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a sectional view of the upper mold of the present invention;

FIG. 3 is a cross-sectional view of the lower mold of the present invention;

fig. 4 is a schematic structural view of the middle trimming assembly of the present invention.

In the figure:

1. an upper die; 2. a lower die; 3. a seal ring; 4. a trimming assembly;

11. injection molding holes; 12. an exhaust hole; 13. an exhaust pipe; 14. a sealing cover; 15. an upper injection molding groove; 16. a first mounting groove; 17. positioning holes;

21. positioning a rod; 22. a second mounting groove; 23. a lower injection molding groove; 24. pressing the groove; 25. a guide bar; 26. a spring;

41. a pressing block; 42. a guide plate; 43. a first fixing plate; 44. a fixing rod; 45. a second fixing plate; 46. a tool apron; 47. a cutter;

421. a guide groove; 422. a screw; 423. a thread block; 424. an electric motor.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Please refer to fig. 1-4:

the utility model provides a no overlap thin round hole shaping injection mold, includes mould 1 and bed die 2, still includes: the two sealing rings 3 are respectively positioned at the lower end of the upper die 1 and the upper end of the lower die 2, the sealing rings 3 are used for enhancing the connection tightness between the upper die 1 and the lower die 2, and the upper die 1 is provided with an exhaust hole 12; the trimming component 4 and the trimming component 4 are symmetrically arranged on the upper side of the lower die 2 and comprise cutters 47 used for cutting off the flash, the cutters 47 can extend to the middle of the lower die 2 when in use, and the cutters 47 can move up and down in the vertical direction to cut off the flash of the model.

In this embodiment, the air vent 12 is used to vent air between the upper molding groove 15 and the lower molding groove 23.

The bottom end of the upper die 1 is provided with an upper injection groove 15, the top end of the upper die 1 is provided with an injection hole 11 communicated with the upper injection groove 15, the injection hole 11 is provided with a sealing cover 14, the exhaust hole 12 is communicated with the upper injection groove 15, the upper end of the exhaust hole 12 is provided with an exhaust pipe 13, the edge of the bottom side of the upper injection groove 15 is provided with an annular first mounting groove 16, one sealing ring 3 is positioned in the first mounting groove 16, and the bottom end of the upper die 1 is provided with a plurality of positioning holes 17.

In this embodiment, the sealing cover 14 is hinged on the upper end of the injection hole 11, the exhaust pipe 13 is fixedly arranged on the upper end of the exhaust hole 12, and the sealing ring 3 is fixedly arranged in the first mounting groove 16.

Seted up a plurality of locating levers 21 on the lower mould 2, lower mould 2 upper end has been seted up down and has been moulded plastics groove 23, and lower mould 23 upside edge has seted up second mounting groove 22, and another sealing washer 3 is located second mounting

groove

22, and 2 side symmetries of lower mould have seted up and have been pressed the groove 24.

In this embodiment, the number and the position of a plurality of positioning rods 21 are matched with a plurality of positioning holes 17, when the upper mold 1 and the lower mold 2 are connected, the positioning rods 21 are respectively inserted into the positioning holes 17, so that the upper injection groove 15 is aligned with the lower injection groove 23, another sealing ring 3 is fixedly installed in the second installation groove 22, the two sealing rings 3 are matched to enable the upper mold 1 and the lower mold 2 to be connected more tightly, before the molds are used, the upper mold 1 and the lower mold 2 are connected, the exhaust pipe 13 is connected with the vacuum pump, air between the upper mold 1 and the lower mold 2 is pumped out by the vacuum pump, gaps between the upper mold 1 and the lower mold 2 are reduced as much as possible, flash caused by seepage of injection liquid from the gaps is avoided, the sealing cover 14 covers the injection hole 11 before injection liquid is injected, and air is prevented from entering.

The trimming assembly 4 comprises a guide plate 42, pressing blocks 41 are symmetrically arranged on two sides of the guide plate 42, a first fixing plate 43 is arranged on one side of the upper end of the guide plate 42, a second fixing plate 45 is arranged in the middle of the upper end of the guide plate 42, a fixing rod 44 is arranged between the first fixing plate 43 and the second fixing plate 45, a cutter holder 46 is arranged at one end of the fixing rod 44, and a cutter 47 is located at the tail end of the cutter holder 46.

In this embodiment, the pressing blocks 41 are symmetrically and fixedly connected to two sides of the guide plate 42, the second fixing plate 45 is fixedly connected to the upper end of the guide plate 42, the first fixing plate 43 is not connected to the guide plate 42, one end of the fixing rod 44 is fixedly connected to the side end of the first fixing plate 43, the fixing rod 44 penetrates through the second fixing plate 45 and is slidably connected to the second fixing plate, the other end of the fixing rod 44 is fixedly connected to the cutter holder 46, and the cutter 47 attached to the lower end of the cutter holder 46 and shaped like the injection molding groove 23 is fixedly installed.

Guide way 421 has all been seted up to deflector 42 upper end, has screw rod 422 in the guide way 421, is provided with screw block 423 in the guide way 421, and screw block 423 is connected at first fixed plate 43 lower extreme, still is provided with the pivoted power supply of drive screw 422 in the guide way 421.

In this embodiment, one end of the screw 422 is rotatably connected to the side wall of the guide groove 421, the screw block 423 is screwed on the screw 422, the screw block 423 is fixedly connected to the lower end of the first fixing plate 43, the power source is the motor 424, specifically, the motor 424 is fixedly installed on the side wall of the guide groove 421, the output shaft of the motor is fixedly connected to the other end of the screw 422, the screw 422 is driven to rotate, along with the rotation of the screw 422, the screw block 423 drives the first fixing plate 43 to horizontally move along the guide groove 421, the first fixing plate 43 drives the fixing rod 44 and the cutter 47 to be close to the edge of the lower injection molding groove 23, in this process, the fixing rod 44 slides on the second fixing plate 45, and the cutter 47 is just aligned to the edge of the lower injection molding groove 23 when the first fixing plate 43 contacts with the second fixing plate 45.

One side of the guide plate 42 extends into the pressing groove 24, a plurality of guide rods 25 are arranged in the pressing groove 24, and elastic members are arranged on the guide rods 25 and are springs 26.

In this embodiment, each pressing groove 24 has at least two guide rods 25 therein, wherein the top and bottom ends of the guide rods 25 are respectively and fixedly connected with the top and bottom of the pressing groove 24, one side of the guide plate 42 is respectively and slidably connected with all the guide rods 25 in the pressing groove 24 on the same side, the springs 26 are respectively sleeved on the guide rods 25, the bottom ends of the springs 26 are respectively and fixedly connected with the bottom of the pressing groove 24, and the upper ends of the springs 26 are respectively and fixedly connected with the bottom end of the guide plate 42.

When the injection molding machine is used specifically, the positioning rods 21 are respectively inserted into the positioning holes 17, the upper injection molding groove 15 is aligned with the lower injection molding groove 23, so that the upper mold 1 is connected with the lower mold 2, the exhaust pipe 13 is connected with the vacuum pump, air between the upper mold 1 and the lower mold 2 is pumped out by the vacuum pump, a gap between the upper mold 1 and the lower mold 2 is reduced as much as possible, injection molding liquid is prevented from seeping out from the gap to generate flash, the sealing cover 14 covers the injection molding hole 11 before the injection molding liquid is injected, air is prevented from entering, the sealing cover 14 is opened, the injection molding liquid is rapidly introduced between the upper injection molding groove 15 and the lower injection molding groove 23, and then the sealing cover 14 is closed; after the model is formed, the upper mold 1 is taken down firstly, if a small amount of flash is found, the motors 424 on two sides can be started, the two screw rods 422 are driven to rotate, the thread block 423 drives the first fixing plate 43 to horizontally move along the guide groove 421 along with the rotation of the screw rods 422, the first fixing plate 43 drives the fixing rod 44 and the cutter 47 to be close to the edge of the lower injection molding groove 23, the fixing rod 44 slides on the second fixing plate 45 in the process, the cutter 47 is just aligned to the edge of the lower injection molding groove 23 when the first fixing plate 43 is in contact with the second fixing plate 45, the two guide plates 42 are pressed downwards through the pressing blocks 41 on two sides, the two cutters 47 move downwards to cut off the flash of the model, the step of taking out the model for polishing in the later period is omitted, and the production efficiency is improved.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only the preferred embodiments of the present invention, and is not intended to limit the present invention, and that there may be various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a no overlap thin round hole shaping injection mold, includes upper die (1) and bed die (2), its characterized in that: further comprising:

the sealing rings (3) are arranged and are respectively positioned at the lower end of the upper die (1) and the upper end of the lower die (2), the sealing rings (3) are used for enhancing the connection tightness between the upper die (1) and the lower die (2), and the upper die (1) is provided with an exhaust hole (12);

the trimming component (4), the trimming component (4) symmetry set up in the upside of bed die (2), including cutter (47) that are used for excising the overlap, cutter (47) can stretch to when using bed die (2) middle part, cutter (47) can be in the vertical direction move down and excise the overlap of model.

2. The flash-free fine round hole molding injection mold according to claim 1, characterized in that: go up mould (1) bottom and seted up and mould plastics groove (15), the intercommunication has been seted up on last mould (1) top go up the hole (11) of moulding plastics of the groove (15) of moulding plastics, be provided with sealed lid (14) on the hole (11) of moulding plastics, exhaust hole (12) intercommunication go up the groove (15) of moulding plastics, exhaust hole (12) upper end has blast pipe (13), go up the edge of the groove (15) bottom side of moulding plastics and seted up annular first mounting groove (16), one of them sealing washer (3) are located in first mounting groove (16), a plurality of locating holes (17) have been seted up to last mould (1) bottom.

3. The flash-free fine round hole molding injection mold according to claim 1, characterized in that: the sealing ring sealing device is characterized in that a plurality of positioning rods (21) are arranged on the lower die (2), a lower injection molding groove (23) is formed in the upper end of the lower die (2), a second mounting groove (22) is formed in the edge of the upper side of the lower injection molding groove (23), the other sealing ring (3) is located in the second mounting groove (22), and pressing grooves (24) are symmetrically formed in the side end of the lower die (2).

4. The flash-free fine round hole molding injection mold according to claim 3, characterized in that: the trimming assembly (4) comprises guide plates (42), pressing blocks (41) are symmetrically arranged on two sides of each guide plate (42), a first fixing plate (43) is arranged on one side of the upper end of each guide plate (42), a second fixing plate (45) is arranged in the middle of the upper end of each guide plate (42), a fixing rod (44) is arranged between each first fixing plate (43) and the corresponding second fixing plate (45), a cutter holder (46) is arranged at one end of each fixing rod (44), and a cutter (47) is located at the tail end of each cutter holder (46).

5. The flash-free fine round hole molding injection mold according to claim 4, characterized in that: guide way (421) have all been seted up to deflector (42) upper end, screw rod (422) have been had in guide way (421), be provided with screw block (423) in guide way (421), screw block (423) are connected first fixed plate (43) lower extreme, still be provided with the drive in guide way (421) screw rod (422) pivoted power supply.

6. The flash-free fine round hole molding injection mold according to claim 4, characterized in that: one side of the guide plate (42) extends into the pressing groove (24) respectively, a plurality of guide rods (25) are arranged in the pressing groove (24), and elastic parts are arranged on the guide rods (25).

7. The flash-free fine round hole molding injection mold according to claim 6, characterized in that: the elastic pieces are all springs (26).